Motorized winch

ABSTRACT

A winch composed of a drum driven by a low speed hydraulic motor and having braking means mounted within the drum. There is a motor shaft and a drum shaft, with the drum shaft having a swivel connection at one end to a fixed plate forming part of the frame and having its opposite end fixed to the drum, and the motor shaft being drivingly connected to the drum. The drum mounting opposite the swivel connection allows some radial play to compensate for misalignment of the two shafts.

United States Patent lnventor Gabriel L. Guinot Le Plessls-Belleville, Olse, France Appl. No. 849,069

Filed Aug. 1 1, 1969 Division of Ser. No. 673, 472, Oct. 6, 1967, abandoned Patented Aug. 31,1971

Assignee Societe Anonyme Poclaim, Le Plessis-l Belleville, Oise, France MOTORISED WINCH 3 Claims, 1 Drawing Fig.

US. Cl. 254/150, 254/186 Int. Cl 866d l/30 Field of Search 254/185,

References Cited UNITED STATES PATENTS 3,280,776 10/1966 Lehmann 25%15-9 FOREIGN PATENTS 709,239 7/1941 Germany 254/150 205,250 1/1968 U,S.S.R. 254/150 552,334 1/1931 Germany 254/186 Primary Examiner-l-larvey C. Homsby AttorneyMason, F enwick & Lawrence ABSTRACT: A winch composed of a drum driven by a low speed hydraulic motor and having braking means mounted within the drum. There is a motor shaft and a drum shaft, with the drum shaft having a. swivel connection at one end to a fixed plate forming part of the frame and having its opposite end fixed to the drum, and the motor shaft being drivingly connected to the drum. The drum mounting opposite the swivel connection allows some radial play to compensate for misalignment of the two shafts.

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This invention relates to a motor-driven winch and isa division of my prior application, Ser. No. 673,472, now abandoned.

Numerous constructions of winches driven by electric or petrol motors or even steam turbines are already known. In many of these known constructions the winch drum is mounted on two bearings and is coupled to the motor by a flexible coupling which permits a degree of angular movement, i.e. disalignment, of the drum relative to the driving shaft. Such motor driven winches are also often provided with speed reduction gears. Motor driven winches in whichthe winch drum is mounted coaxially with the output shaft of the motor and provided with a degree of radial play are also known.

The above known types of winch must be provided with braking means notonly for showing down and finally stopping the drum but maintaining the drum stationary when stopped.

Winches of these known constructions have the disadvantages that they are heavy, cumbersome and complicated in construction and consequently not entirely suitable for use with public works and goods handling machines.

The object of the present invention is to provide an improved construction of winch which is free from these disadvantages and which is particularly suitable for use with public works and good handling machines.

The motor-driven winch according to the invention cornprises an hydraulic motor having an output shaft, a drum mounted for radial play coaxial with and drivingly connected to said output shaft, a secondary shaft drivingly connected at one of its ends with an integral part of said drum and supported at its other end by a swivel bearing mounted on a fixed closure plate of said drum.

in order that the invention may be more clearly understood a particular embodiment thereof will now be described, by way of example with reference to the accompanying drawing which is an axial section through a winch according to the invention.

Referring to this drawing, the winch comprises a winch drum 1 driven by a low-speed hydraulic motor 7 supplied with hydraulic operating fluid by a pump P arranged in an hydraulic circuit, the return pipe line 74 of which is provided with a braking or check valve 7b. The drum 1 is arranged coaxially with the output shaft 6 of the motor and is drivingly connected with said shaft at one end through a drive member which consists of a sleeve rigidly mounted on the drive shaft 6 and having an external outwardly directedradial flange 4 by which said drive member is drivingly connected to an internal inwardly directed radial flange 2 integral with the drum 1. The drive members 4, 5 may be mounted fast on the shaft 6 in any suitable manner but in the embodiment shown is splined on to the shaft.

The drum 1 is provided at its opposite end with a fixed closure plate 8 bolted to a frame structure, and having a peripheral sealing ring 16 of rubber or rubberlike material between the drum and the closure plate which prevents dust and dirt from entering the drum. Mounted on the closure plate 8 within the drum is a drum brake, indicated generally by reference numeral 9, and described in detail in the specification of our copending application, Ser. No. 673,472, filed Oct. 6. l967.

' The flange 4 of the driven member is provided with a drive pin l7 which engages in a recess 2a in the flange 2 of the drum. Thus there is no rigid connection between the flanges 2 and 4, but considerably radial play is possible between the flange 2 and sleeve 5. A secondary shaft 18 is provided, said shaft having a divergent or bell-shaped'flange portion 18a at one end by means of which it is bolted to the flange 2 of the drum by bolts 19. The opposite end of secondary shaft 18 is mounted in a swivel bearing 20, which may be a ball or roller bearing, mounted in the end closure plate 8 and thus any possible misalignment between the output shaft 6 and the caring 20 is compensated for by theswivel bearing and the play between the flange 2 and sleeve 5.

It will be understood that the invention is not limited to the details of construction described and illustrated but modifications can be made without departing from thescope of the invention as defined in the appended claims.

For example the inner end of the secondary shaft 18 need not necessarily be-provided with a bell-shaped portion 18a for connecting it with the drum flange 2 but may be provided with radial spokes or other means for this purpose.

What I claim is:

i 1. A motor-driven winch comprising, a fixed plate, a motor having an output shaft, a drum, and means mounting the drum for radial play relative to the output shaft and for driving connection to the output shaft including, a secondary shaft coaxial with the drum connected to the drum and mounted in a swivel bearing on the fixed plate, the drum having a central opening'larger in diameter than the motor output shaft and surrounding the motor output shaft with said central opening in the drum being in-an inwardly directed flange integral with the drum and adjacent the drum end at the motor side and said secondary shaft being connected'to said inwardly directed flange, a radially extending flange mounted on said motor output shaft, a drive pin fixedly mounted on said radially extending flange, a recess formed in said inwardly directed flange of saiddrum, said drive pin and recess being radially offset and extending parallel to the axis of said motor and secondary shafts, said drive pin being seated in said recess and said recess being of a larger diameter than the drive pin to permit said radial play.

2. A motor-driven winch as claimed in claim 1 wherein, the secondary shaft has a divergent portion adjacent the drum flange to span the central opening and form means for connectiori to the drumflange.

3. A motor-driven winch comprising, a fixed plate, a motor having an output shaft, a drum, and meansmounting the drum for radial play relative to the output shaft and for driving connection to the output shaft including, a secondary shaft coaxial with the drum connected to the drum and mounted in a swivel bearing on the fixed plate, the drum having a central opening larger in diameter than the motor output shaft and surrounding the motor output shaft with said central opening in the drum being in an inwardly directed flange integral with the drum and adjacent the drum end at the motor side with said secondary shaft being connected to said inwardly directed flange, radially extending flange mounted on said motor output shaft, adrive pin fixedly mounted on one of said flanges and a recess formed in said other of said flanges, said drive pin and recess being radially offset and extending parallel to the axis of said motor and secondary shafts, said drive pin being seated in said recess and said recess beingof a larger diameter than the drive pin to permit said radial play. 

1. A motor-driven winch comprising, a fixed plate, a motor having an output shaft, a drum, and means mounting the drum for radial play relative to the output shaft and for driving connection to the output shaft including, a secondary shaft coaxial with the drum connected to the drum and mounted in a swivel bearing on the fixed plate, the drum having a central opening larger in diameter than the motor output shaft and surrounding the motor output shaft with said central opening in the drum being in an inwardly directed flange integral with the drum and adjacent the drum end at the motor side and said secondary shaft being connected to said inwardly directed flange, a radially extending flange mounted on said motor output shaft, a drive pin fixedly mounted on said radially extending flange, a recess formed in said inwardly directed flange of said drum, said drive pin and recess being radially offset and extending parallel to the axis of said motor and secondary shafts, said drive pin being seated in said recess and said recess being of a larger diameter than the drive pin to permit said radial play.
 2. A motor-driven winch as claimed in claim 1 wherein, the secondary shaft has a divergent portion adjacent the drum flange to span the central opening and form means for connection to the drum flange.
 3. A motor-driven winch comprising, a fixed plate, a motor having an output shaft, a drum, and means mounting the drum for radial play relative to the output shaft and for driving connection to the output shaft including, a secondary shaft coaxial with the drum connected to the drum and mounted in a swivel bearing on the fixed plate, the drum having a central opening larger in diameter than the motor output shaft and surrounding the motor output shaft with said central opening in the drum being in an inwardly directed flange integral with the drum and adjacent the drum end at the motor side with said secondary shaft being connected to said inwardly directed flange, radially extending flange mounted on said motor output shaft, a drive pin fixedly mounted on one of said flanges and a recess formed in said other of said flanges, said drive pin and recess being radially offset and extending parallel to the axis of said motor and secondary shafts, said drive pin being seated in said recess and said recess being of a larger diameter than the drive pin to permit said radial play. 